Fastening device for doors.



C. E. WALRAVEN. FASTENING DEVICE FOR DOORS. APPLICATION FILED MT. 31. 1916.

Patented Feb. 13, 1917.

MINIMUM I I gwuenfoz CwiesEWauelz.

- UNITED STATES PATENT OFFICE.

cmnas ELWOOD WALBAVEN, or woonmmr, NEW many. ras'mmne DEVICE ron DOORS.

Be it known that 1, CHARLES E. War.- RAVEN, a citizen of the United States, reading at Woodbury, in the county of Gloucester and State of .New Jersey, have invented certain new and useful Improvements in Fastening Devices for Doors, of which the following is a specification.

- rable, and which can be manufactured and My invention consists of an improved fastening device for doors, and is particularly serviceable for use on furnace doors.

It is well lmown that furnace doors for tubular boilers are often blown open due to the blowing out of a tube in the boiler and firemen have often been injured by the hot coals and gases when the doors have been blown open as above described. Therefore, one of the objects of my invention is to provide a fastening device which when used on furnace doors will prevent accidental opening of the door, either by the blowing out of tubes in the furnace or any other rea,-.

sons.

Another object of my invention is to provide a door fastening device which will be of comparatively simple construction, du-

applied to furnaces at a reasonable cost.

These objects, and other advantageous ends which will be described hereinafter, I attain in the following manner, reference being had to the accompanying drawings in which Figure 1 is a front elevation of my invention forming a fastening device for a furnace door. Fig. 2 is a section on the line aa of fieferring to the drawings, 1 represents the front p ate or casing of a furnace having an opening 2 designed to be closed by a door 3, the latter is pivotally supported by means of a rod 4 which passes through lugs 5 on the furnace plate 1 and lugs 6 on the door 3 in the usual manner of pivoting a furnace door, the upper end ofthe rod 4 being provided with a cotter pin 7 to pre-.

Patented Feb. 13. 1917 Specification of Letters Intent.

Application filed 0mm :1, 1018. sum in. 128,05 To all whom it may concern: slot 11 in a handle lever 12, the latter being pivoted at 13 to the door 3 as clearly shown In Flg. 1. I

A second staple 14 is integral with or secured to the furnace casing and has its internal surface 17 beveled as clearly shown in Fig. 1. The forward end portion 15 of the bolt 9 is slightly curved inwardly and made wedge shape as shown at 16 at its outer end, so that a forward sliding movement of the bolt 9 causes the wedge portion 16 to en age the inner beveled surface 17 of the stap e 14, and thereby cause the door to snugly fit adjacent the edge portion of the plate 1 which provides the opening 2.

- The handle lever 12 has a cylindrical stem 18 which forms the bearlngfor a roller 19,

and a detachable handle 20, preferably of wood, is provided at the extreme upper end of the handle lever 12. The roller 19 is designed to move between the outer surface 21 of the furnace door and the inner surface mally assumes a position closer to the outer surface of the door 3' than the outermost portion of the roller 19, however, the end portions 25 and 26 of the spring member 23 provide suflicient space for the-position of the roller 19 in either of its two extreme -positions into which the handle lever 12 may be moved.

It will be noted that a swin movement of the handle lever 12 from the position illustrated to a position suflicient to remove the bolt 9 from the-staple 14 requires that the roller 19 will engage and move outwardl the portion 24 of the spring member 23. said portion 24, the latter'will automatically return to its normal position.

It will thus be seen that the provision of the spring member 23 assists in holding the handle lever 12 in either of two positions,

namely, to lock the door b the engagement of the bolt 9 with the stap e 14 or tounlock owever, as soon as the roller 19 passes the door by the removal of the bolt 9 from the staple 14. When the bolt 9 is in engagement with the staple 14, the spring member 23 will prevent any internal pressure within the furnace from opening the door, the reason being that the openin movement of the door is transverse to the ongitudinal move roller mentoi the bolt, and also for the reason that it requires considerable force to move the 19 past the portion 24 of the spring member 23, so that the bolt 9 can not accidentally move longitudinally.

By the use of my invention, 1' provide a secure door fastening device which is of simple construction, which may be easily operated and eificiently operates to close the opening in a furnace casing or other construction. The handle 20 is preferably detachably connected and 'may be removed after the door 3 has been locked.

While I have described my invention as taking a particular form, it will be understood that the various parts of m invention may be chan ed without departing from the spirit thereoi and hence I do not limit myself to the precise construction set forth, but consider that I am at liberty to make such changes and alterations as fairly come within the scope of the appended claims.

Having thus described my invention, what I claim as new and desire to secure by Let ters Patent is:

1. A fastening device for a door, comprising a, bolt, means pivoted to said door for moving the bolt, an elongated resilient member having its ends curved inwardly and secured to said door, said bolt-moving means bein operative between said resilient member an the door, said resilient member having a central inwardly projecting portion normally operative to hold the boltmoving means in different positions against accidental pivotal movement, substantiall as described.

2. A fastening device for a door, comprising a bolt, a handle lever pivoted to said door and having a pin and slot connection 40 with said bolt, an elongated resilient member having its ends curved inwardly and secured to said door and having an inwardly projecting portion designed to be engaged and moved outwardly by said lever when the latter is manually operated to move the bolt into and out of operative position, said inwardly pro ecting portion being designed to retain the handle lever in different positions ad acent opposite ends of the resilient member, substantially as described.

3. A fastening device for a door, comprising a bolt, a handle lever pivoted to said door and having a pin and slot connection with said bolt, a cylindrical stem on said lever, a roller on said stem, an elongated resillent member mounted on said door and havingan inwardly projecting portion designed to be engaged by said roller when the lever is manually operated to move the bolt into and out of operative position, said inwardly projecting portion being, designedto retain the handle lever in different'positions adjacent opposite ends of the resilient member, and being movable outwardly by said roller during a swingin movement of the handle lever, scribed.

In testimony whereof I have signed my. name to this specification in the presence of 70 a two subscribing witnesses.

CHARLES ELWOOD WALBAVEN.

Witnesses:

J. EV, ANDERSON, E. W; ANDERSON.

substantially as de- 

